import java.util.ArrayDeque;
import java.util.Deque;

public class DequeJava {

    public static void main(String[] args) {
        Deque<String> deque = new ArrayDeque<>();

        deque.offerFirst("Budi");
        deque.offerLast("Siti");
        deque.offerFirst("Dewi");
        deque.offerLast("Andi");

        System.out.println("deque        : " + deque);
        System.out.println("peekFirst()  : " + deque.peekFirst());
        System.out.println("peekLast()   : " + deque.peekLast());
        System.out.println("pollFirst()  : " + deque.pollFirst());
        System.out.println("pollLast()   : " + deque.pollLast());
        System.out.println("deque        : " + deque);
        System.out.println("ukuran()     : " + deque.size());
    }
}